1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)?
1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Question
1. How does loading of the Generator affect the Generator’s Terminal Voltage (VT) and Load Current (IL)?
2. Write down the Voltage equation of a Separately excited DC Generator.
3. What is the reason for drop in Generator’s Terminal voltage, from No load to Full load?
Transcribed Image Text:Aim:
To obtain the External or Loading Characteristics of a separately excited DC Generator.
Apparatus required:
SI. No
Name of the Apparatus
Specification / Range
Quantity
2
3
4
6
7
Circuit Diagram:
Fuse
AI
M.
'Br
B
Transcribed Image Text:MIEE 2110N Electrical Technology
Exercise - 6
MIEE 211ON Electrical Technology
Excrcise - 6
Procedure:
1. Make the connections as indicated in the circuit diagram.
2. Keep the voltage knob of the Variable DC Power Supply to the DC Shunt Motor in zero (0)
condition, as indicated in Voltmeter 1 across the Motor Armature. The Motor Excitation Rheostat
should also be kept at minimum.
3. Switch "ON" the Main Supply.
4. Increase the Voltage of the Variable DC Supply of the Mechanical Power Supply Unit such that the
Voltmeter 2 (V) reads 160V.
Graph:
Scale:
X axis 1 unit
Y axis 1 unit =
5. Using a Digital Tachometer, increase the Voltage of the Variable DC Supply so that the Speed of the
Generator reaches 3000 RPM (Voltmeter 1 across the Motor Armature (EB) will show 206V.
6. Increase the excitation of the field by increasing the Voltage of the Variable DC Supply of the
Generator (EG) in increments up to its rated voltage 220v. Take note of initial reading of Generator
Terminal Voltage (VT) on Voltmeter 3 and the Load Current (IL.) on the Ammeter (10 Amp setting) at
No-Load.
7. Introduce the Load and take note of the Corresponding Terminal Voltage (VT) on Voltmeter 3 and
the Load Current (L) on the Ammeter (10 Amp Setting).
8. Plot the graph (for scale) Generator's Terminal Voltage (Vr) versus its Load Current (I1.).
Observation:
Generator Terminal Voltage
(Vr in V)
Generator Fleld Current
Trial No.
(I. in A)
Conclusions:
Initial
1. How does loading of the Generator affect the Generator's Terminal Voltage (VT) and Load Current (I.Y?
1
220
212,5
e,489
204,3
0,893
2. Write down the Voltage equation of a Separately excited DC Generator.
3.
198,3
1,401
4
190,2
1,981
3. What is the reason for drop in Generator's Terminal voltage, from No load to Full load?
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